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Dust and Segregation-Free Powders for Flexible P/M Processing

Publisher: Hoeganaes Corp.

Format: PDF
Date: 2007-03-13

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Hoeganaes Corp.
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Overview:
ANCORBOND, a process that bonds alloy additives and fines to the base iron particles is described in this paper. It explains how ANCORBOND technology improves the flexibility of P/M manufacturing in terms of improved compressibility, green strength, and adjustment of apparent density. Benefits of this technology are listed in a tabular form. Several factors that contribute to the performance and flexibility of binder-treated mixes in comparison with regular mixes are detailed along with SEM photomicrographs. It records the conclusion that binder-treated premixes significantly reduce the amount of respirable nuisance dust present in the workplace.

TABLE OF CONTENTS
1.	Introduction	1
2.	Bonding	1-5
3.	Flow and Die Fill	5-9
4.	Weight Control	9
5.	Green Strength	10-11
6.	Improved Compressibility	11-12
7.	Environmental Dust Testing	12-14
8.	Future Developments	14-15
9.	Conclusions	15
10.	Acknowledgements	15
11.	References	15-16
12.	Tables	1-14
12.1	ANCORBOND Benefits	1
12.2	Apparent Density Flexibility in a Binder-Treated F-0008 Premix	8
12.3	Increased Green Strength for Binder-Treated Premixes	11
12.4	Improved Compressibility for a FC-0208 Premix	12
13.	Figures
13.1	Schematic of Alloy Distribution in the Various Types of Premixes	3
13.2	Binder Location with Respect to Lubricant and Admixed Fines	4
13.3	Theoretical Bonding Strength of Agglomerates	4
13.4	SEM photomicrographs of regular and binder-treated premixes	6-7
13.5	SEM photomicrographs of binder-treated premix showing fine iron
particles bonded to coarser iron particles	8
13.6	Binder-Treated Premix	10
13.7	Regular Unbonded Premix	11
13.8	Respirable Dust in Work Area for a Conventional Premix and an ANCORBOND Premix	14